libpng-1.2.46 and 1.0.56 are available from
These fix a problem with Makefile.in and Makefile.am
that caused 1.2.45 and 1.0.55 to fail to build. Also I added
some filenames (CMakeLists.txt, projects/xcode, and
pnggccrd.c) to the EXTRA_DIST list so "make distcheck"
would work properly.
I added "make distcheck" to my private build procedure for
all versions to help prevent such errors in the future.